TY - JOUR
T1 - Photoluminescence and thermal stability of Mn2+ co-doped SrSi2O2N2:Eu2+green phosphor synthesized by sol-gel method
AU - Liu, Jiaqing
AU - Wang, Xiaojun
AU - Xuan, Tongtong
AU - Li, Huili
AU - Sun, Zhuo
PY - 2014/4/25
Y1 - 2014/4/25
N2 - Eu2+ and Mn2+ co-doped SrSi2O 2N2 phosphors were firstly synthesized via a simple sol-gel method using low-cost SrCO3, Eu2O3, Mn(CH3COO)2 × 4H2O, α-Si 3N4 and C8H20O4Si (TEOS) as the starting materials. Their luminescence properties, quantum yield, and thermal stability were investigated in comparison with the single Eu 2+ doped samples. The green emission intensity of Eu2+ ions is greatly enhanced by introducing Mn2+ ions into SrSi 2O2N2:Eu2+ due to the coexcitation and energy transfer between Mn2+ and Eu2+. The energy transfer probability from Mn2+ to Eu2+ depends strongly on the Mn2+ concentration, which is maximized at 2.0 mol%. Mn 2+. Simultaneously, quantum efficiency and thermal stability in SrSi2O2N2:0.03Eu2+, 0.02Mn 2+ is dramatically improved. All these excellent optical properties indicate that SrSi2O2N2:Eu2+, Mn2+ synthesized in the present work is a promising green-emitting phosphor for white-light emitting diodes with near-UV LED chips.
AB - Eu2+ and Mn2+ co-doped SrSi2O 2N2 phosphors were firstly synthesized via a simple sol-gel method using low-cost SrCO3, Eu2O3, Mn(CH3COO)2 × 4H2O, α-Si 3N4 and C8H20O4Si (TEOS) as the starting materials. Their luminescence properties, quantum yield, and thermal stability were investigated in comparison with the single Eu 2+ doped samples. The green emission intensity of Eu2+ ions is greatly enhanced by introducing Mn2+ ions into SrSi 2O2N2:Eu2+ due to the coexcitation and energy transfer between Mn2+ and Eu2+. The energy transfer probability from Mn2+ to Eu2+ depends strongly on the Mn2+ concentration, which is maximized at 2.0 mol%. Mn 2+. Simultaneously, quantum efficiency and thermal stability in SrSi2O2N2:0.03Eu2+, 0.02Mn 2+ is dramatically improved. All these excellent optical properties indicate that SrSi2O2N2:Eu2+, Mn2+ synthesized in the present work is a promising green-emitting phosphor for white-light emitting diodes with near-UV LED chips.
KW - Energy transfer
KW - Phosphor
KW - Sol-gel
KW - SrSiON:Eu Mn
UR - http://www.scopus.com/inward/record.url?scp=84893263360&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2013.12.185
DO - 10.1016/j.jallcom.2013.12.185
M3 - Article
AN - SCOPUS:84893263360
SN - 0925-8388
VL - 593
SP - 128
EP - 131
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
ER -